Parallel processing inverter system

A novel method of instantaneous voltage and power balance control of a parallel processing inverter system is proposed. It consists of a high-speed switching PWM (pulsewidth modulated) inverter with an instantaneous current minor loop controller, a voltage major loop controller, and a power balance controller. This system realizes the following functions with only one inverter: constant AC output voltage control with reactive power control, active filtering to absorb load current harmonics, DC voltage and current control as AC-to-DC converter, and uninterruptible power supply (UPS) for stand-alone operation. This system covers a wide application range, including UPS systems, new energy systems, and active filters with voltage control functions. >

[1]  T. Kawabata,et al.  UPS Systems using Multi-functional Inverters , 1987, INTELEC '87 - The Ninth International Telecommunications Energy Conference.

[2]  Eduardo P. Wiechmann,et al.  Application of Current Source Inverters in UPS Systems , 1984, IEEE Transactions on Industry Applications.

[3]  Hirofumi Akagi,et al.  A new approach to harmonic compensation in power systems , 1988 .

[4]  L. Gyugyi,et al.  Active ac power filters , 1976 .

[5]  T. Kawabata,et al.  Dead beat control of three phase PWM inverter , 1987, IEEE Power Electronics Specialists Conference.